Hi jdp, thanks for your reply. Yes I followed the set up instructions very carefully and have re-synced a few times at 0 load to re-test. I am sure the wiring is correct too. It seems very strange that the monitor is reporting -1.9amps (or -23w) regardless of the speed setting of the motor. The specifications for the motor say about 7.5amps at speed 1 up to 35 amps at speed 5.